2
$\begingroup$

At a triple junction plate boundary there are three tectonic plates meeting. We have plenty of examples of these boundaries on Earth, notably the Afar Triple Junction, Mendocino Triple Junction, and the extinct South Greenland Triple Junction. The majority of these junctions are divergent. But what if two of the three boundaries were convergent?

I am currently working on a fantasy world but thought this question was more appropriate for this SE. This is the triple junction I am asking about.

enter image description here

The arrows that go under the colored lines are where the subducting is. The salmon line is convergent and the mint line is divergent.

I was wondering if it was possible for a plate to both subduct another plate and also be subducted on basically the same boundary.

$\endgroup$
2
  • $\begingroup$ I find your drawing a bit confusing as the right plate is moving two different directions? $\endgroup$ Commented Jun 4, 2023 at 10:40
  • $\begingroup$ @JeopardyTempest That was confusing, sorry. I also realized I had the wrong plates subducting. $\endgroup$
    – Martamo
    Commented Jun 4, 2023 at 12:00

1 Answer 1

1
$\begingroup$

On a large scale yes.

On a small scale you mostly get a complex mess of micro-plates created by the diverse forces.

enter image description here

enter image description here

A triple junction of any type of plate interaction can form, Japan has an all subduction triple junction.

$\endgroup$
1
  • $\begingroup$ Ok, cool. This is on a large scale. The plates are all much larger than the South American plate. $\endgroup$
    – Martamo
    Commented Jun 5, 2023 at 2:12

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.